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kernel/sys.c: fix potential Spectre v1 issue
[sfrench/cifs-2.6.git]
/
fs
/
aio.c
diff --git
a/fs/aio.c
b/fs/aio.c
index 88d7927ffbc61910c8c47948157fccfa8e6f10ed..8061d9787e547d305ea6953a092d61df933b332a 100644
(file)
--- a/
fs/aio.c
+++ b/
fs/aio.c
@@
-1078,8
+1078,8
@@
static struct kioctx *lookup_ioctx(unsigned long ctx_id)
ctx = rcu_dereference(table->table[id]);
if (ctx && ctx->user_id == ctx_id) {
- percpu_ref_get(&ctx->users);
- ret = ctx;
+ if (percpu_ref_tryget_live(&ctx->users))
+
ret = ctx;
}
out:
rcu_read_unlock();